This Cat Age Conversion Chart will help you understand the physiological changes your cat encounters as she ages, as well as anticipate and forestall age-related health problems before they start.Please keep in mind that several factors will determine the comparative physical condition of cats at any given age, including heredity, diet, veterinary care, and whether a cat is keptindoors only or allowed outdoors unsupervised.Cats Age Conversion ChartCat Years Human Years1 152 243 284 325 366 407 448 489 5210 5611 6012 6413 6814 7215 7616 8017 8418 8819 9220 96